Morris WFIN35160 Instructions Manual

LOFT SERIES

• WFIN-26160 / WFOD-26161

• WFIN-35160 / WFOD-35161

• WFIN-50160 / WFOD-50161

• WFIN-70160 - WFOD-70161

CONTENTS

SAFETY PRECAUTIONS

NAME OF PARTS

REMOTE CONTROL

OPERATION INSTRUCTIONS

INSTALLATION PRECAUTIONS

INDOOR UNIT INSTALLATION

OUTDOOR UNIT INSTALLATION

TEST OPERATION

MAINTENANCE

TROUBLESHOOTING

INSTRUCTION FOR SERVICING(R32)

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................................................................................................................................31

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* The design and specifications are subject to change without prior notice for product improvement.

Consult with the sales agency or manufacturer for details.

* The shape and position of buttons and indicators may vary according to the model, but their function

are the same.

1

1. Read this guide before installing and using the appliance.

2. During the installation of the indoor and outdoor units the access to the working area should be

forbidden to children. Unforeseeable accidents could happen.

3. Make sure that the base of the outdoor unit is firmly fixed.

4. Check that air cannot enter the refrigerant system and check for refrigerant leaks when moving

the air conditioner.

5. Carry out a test cycle after installing the air conditioner and record the operating data.

6. Protect the indoor unit with a fuse of suitable capacity for the maximum input current or with

another overload protection device.

7. Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch

or power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding

the risk of electric shock or fire due to insufficient contact.

8. Check that the socket is suitable for the plug , otherwise have the socket changed.

9. The appliance must be fitted with means for disconnection from the supply mains having a

contact separation in all poles that provide full disconnection under over voltage category III

conditions, and these means must be incorporated in the fixed wiring in accordance with the

wiring rules.

10. The air conditioner must be installed by professional or qualified persons.

11. Do not install the appliance at a distance of less than 50 cm from inflammable substances

(alcohol, etc.) Or from pressurized containers (e.g. spray cans).

12. If the appliance is used in areas without the possibility of ventilation, precautions must be taken

to prevent any leaks of refrigerant gas from remaining in the environment and creating a danger

of fire.

13. The packaging materials are recyclable and should be disposed of in the separate waste bins.

Take the air conditioner at the end of its useful life to a special waste collection center for disposal.

14. Only use the air conditioner as instructed in this booklet. These instructions are not intended to

cover every possible condition and situation. As with any electrical household appliance, common

sense and caution are therefore always recommended for installation, operation and maintenance.

15. The appliance must be installed in accordance with applicable national regulations.

16. Before accessing the terminals, all the power circuits must be disconnected from the power supply.

17. The appliance shall be installed in accordance with national wiring regulations.

18. This appliance can be used by children aged from 8 years and above and persons with reduced

physical, sensory or mental capabilities or lack of experience and knowledge if they have been

given supervision or instruction concerning use of the appliance in a safe way and understand

the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance

shall not be made by children without supervision.

SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLER

SAFETY PRECAUTIONS

19. Do not try to install the conditioner alone, always contact specialized technical personnel.

20. Cleaning and maintenance must be carried out by specialized technical personnel. In any case

disconnect the appliance from the mains electricity supply before carrying out any cleaning or

maintenance.

21. Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch

or power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding

the risk of electric shock or fire due to insufficient contact.

22. Do not pull out the plug to switch off the appliance when it is in operation, since this could create

a spark and cause a fire, etc.

23. This appliance has been made for air conditioning domestic environments and must not be used

for any other purpose, such as for drying clothes, cooling food, etc.

24. Always use the appliance with the air filter mounted. The use of the conditioner without air filter

could cause an excessive accumulation of dust or waste on the inner parts of the device with

possible subsequent failures.

25. The user is responsible for having the appliance installed by a qualified technician, who must

check that it is earth in accordance with current legislation and insert a thermos magnetic circuit

breaker.

26. The batteries in remote controller must be recycled or disposed of properly. Disposal of Scrap

Batteries --- Please discard the batteries as sorted municipal waste at the accessible collection point.

27. Never remain directly exposed to the flow of cold air for a long time. The direct and prolonged

exposition to cold air could be dangerous for your health. Particular care should be taken in the

rooms where there are children, old or sick people.

28. If the appliance gives off smoke or there is a smell of burning, immediately cut off the power

supply and contact the Service Center.

29. The prolonged use of the device in such conditions could cause fire or electrocution.

30. Have repairs carried out only by an authorised Service Centra of the manufacturer. Incorrect

repair could expose the user to the risk of electric shock, etc.

31. Unhook the automatic switch if you foresee not to use the device for a long time. The airflow

direction must be properly adjusted.

32. The flaps must be directed downwards in the heating mode and upwards in the cooling mode.

33. Ensure that the appliance is disconnected from the power supply when it will remain inoperative

for a long period and before carrying out any cleaning or maintenance.

34. Selecting the most suitable temperature can prevent damage to the appliance.

2

SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLER

SAFETY PRECAUTIONS

1. Do not bend, tug or compress the power cord since this could damage it. Electrical shocks or fire

are probably due to a damaged power cord. Specialized technical personnel only must replace a

damaged power cord.

2. Do not use extensions or gang modules.

3. Do not touch the appliance when barefoot or parts of the body are wet or damp.

4. Do not obstruct the air inlet or outlet of the indoor or the outdoor unit. The obstruction of these

openings causes a reduction in the operative efficiency of the conditioner with possible consequent

failures or damages.

5. In no way alter the characteristics of the appliance.

6. Do not install the appliance in environments where the air could contain gas, oil or sulphur or near

sources of heat.

7. This appliance is not intended for use by persons (including children ) with reduced physical,

sensory or mental capabilities, or lack of experience and knowledge, unless they have been given

supervision or instruction concerning use of the appliance by a person responsible for their safety.

8. Do not climb onto or place any heavy or hot objects on top of the appliance.

9. Do not leave windows or doors open for long when the air conditioner is operating.

10. Do not direct the airflow onto plants or animals.

11. A long direct exposition to the flow of cold air of the conditioner could have negative effects on

plants and animals.

12. Do not put the conditioner in contact with water. The electrical insulation could be damaged and

thus causing electrocution.

13. Do not climb onto or place any objects on the outdoor unit.

14. Never insert a stick or similar object into the appliance. It could cause injury.

15. Children should be supervised to ensure that they do not play with the appliance. If the supply

cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified

persons in order to avoid a hazard.

3

SAFETY RULES AND PROHIBITIONS

SAFETY PRECAUTIONS

Air filter

Emergency button

Front panel

Air inlet

Indoor Unit

Outdoor Unit

Note: This figure shown may be different from the actual object. Please take the latter as the

standard.

Mounting plate

Air inlet

Drainage pipe

Wiring cover

Connection wiring

Valve protective cover

With the protective cover removed

Liquid valve

(High pressure valve)

Gas valve

(Low pressure valve)

4

Refrigerant

connecting pipe

Air deflector and flap

Air outlet

NAME OF PARTS

Indoor Display

The shape and position of switches and indicators may be different according to the model,

but their function is the same.

1

2

3

Indicator for Timer, temperature and Error codes.

Lights up during Timer operation.

SLEEP mode

5

1

2

3

NAME OF PARTS

REMOTE CONTROL

Remote control DISPLAY

6

The display and some functions of the remote control may vary according to the model.

Symbols

Cooling Mode

Dry Mode

Fan only Mode

Heating Mode

Fan speed:

Auto/ low/ low-mid/ mid/ mid-high/ high

TURBO function

Mute function

Up-down auto swing

Temperature indicator

Meaning

Left-right auto swing

SLEEP function

Timer

Battery indicator

Auto Mode

Health function

I FEEL function

ECO Mode

8 heating function

o

C

Signal indicator

Gentle wind

Child-Lock

Display ON/OFF

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

Self-Clean function

GEN function

REMOTE CONTROL

7

The shape and position of buttons and indicators may vary according to the model, but their

function is the same.

The display and some functions of the remote control may vary according to the model.

The unit confirms the correct reception of each button with the beep.

REMOTE CONTROL

8

Replacement of Batteries

Remove the battery cover plate from the rear of the remote control, by pressing

and sliding it in direction as the arrow.

Install the batteries by putting ( -) at the side with spring on the remote controller.

Reinstall the battery cover by sliding it into place.

Use 2 pieces LRO3 AAA (1.5V) batteries.

Do not use rechargeable batteries.

Replace the old batteries with new ones of the same

type when the display is no longer legible.

Do not dispose batteries as unsorted municipal waste.

Collection of such waste separately for special

treatment is necessary.

Note:

1. Direct the remote control toward the Air conditioner.

2. Check that there are no objects between the remote control and the Signal receptor in the

indoor unit.

3. Never leave the remote control exposed to the rays of the sun.

4. Keep the remote control at a distance of at least 1m from the television or other electrical

appliances.

Each time when insert the batteries in the remote controller for the first time,

you can set the Cooling only or Heating pump control type. As soon as you insert the batteries,

turn off the remote controller, and operate as below.

1. Long press the MODE button, until the ( ) icon flash, to set the Cooling only type.

2. Long press the MODE button, until the ( ) icon flash, to set the Heating pump type.

Note: If you set the remote control in cooling mode, it will not be possible to activate the

heating function in units with a heating pump. If you need to reset, take out the

batteries and install again.

You can program the temperature display between

oo

C and F.

1. Press and hold the TURBO button over 5 seconds to get into the change mode;

oo

2. Press and hold the TURBO button, until it switch to C and F;

3. Then release the pressing and wait for 5 seconds, the function will be selected.

9

REMOTE CONTROL

COOLING MODE

HEATING MODE

The cooling function allows the air

conditioner to cool the room and

reduce Air humidity at the same

time.

HEAT

The heating function allows the air

conditioner to heat the room.

To activate the cooling function (COOL), press the

MODE button until the symbol appears on

the display.

With the button or set a temperature lower

than that of the room.

To activate the heating function (HEAT), press the

MODE button until the symbol appears on the

display.

With the button or set a temperature higher

than that of the room.

In HEATING operation, the appliance can

automatically activate a defrost cycle, which

is essential to clean the frost on the condenser

so as to recover its heat exchange function.

This procedure usually lasts for 2-10 minutes.

During defrosting, indoor unit fan stop

operation. After defrosting, it resumes to

HEATING mode automatically.

COOL

(For North American market)

If necessary, you can press ECO button 10

times within 8 seconds under heating mode

to start the forced defrosting. It will defrost

the outdoor ice much more fast.

DRY MODE

This function reduces the humidity

of the air to make the room more

comfortable.

DRY

To set the DRY mode, Press MODE until

appears in the display. An automatic function of

pre-setting is activated.

FAN MODE (Not FAN button)

FAN

Fan mode, air ventilation only.

To set the FAN mode, press MODE until

appears on the display.

AUTO MODE

Automatic mode.

AUTO

To set the AUTO mode, press MODE until

appears on the display.

In AUTO mode the run mode will be set

automatically according to the room temperature.

FAN SPEED function (FAN button)

FAN

Change the operating fan speed.

Press FAN button to set the running fan speed,

it can be set to AUTO/ MUTE/ LOW/ LOW-MID

/ MID/ MID-HIGH/ HIGH/ TURBO speed circularly.

Child-Lock function

1. Long press MODE and TIMER button together

to active this function, and do it again to

deactivate this function.

2. Under this function, no single button will active.

(Flash)

10

REMOTE CONTROL

To automatic switch on the

appliance.

TIMER function ---- TIMER OFF

To automatic switch off the

appliance.

When the unit is switch-off, you can set the

TIMER ON.

To set the time of automatic switch-on as below:

When the unit is switch-on, you can set the

TIMER OFF.

To set the time of automatic switch-off, as below:

1. Confirm the appliance is ON.

2. Press the TIMER button at first time to set the

switch-off.

Press or to set the needed timer.

3. Press TIMER button at the second time to

confirm.

CANCEL it by press TIMER button.

Note: All programming should be operated within

5 seconds, otherwise the setting will be

cancelled.

TIMER

Never position Flaps manually, the delicate

mechanism might seriously damaged!

Never put fingers, sticks or other objects into

the air inlet or outlet vents. Such accidental

contact with live parts might cause

unforeseeable damage or injury.

1. Press the button SWING to activate the louver,

1.1 Press

to activate the horizontal flaps

to swing from up to down, the will appear

on the remote display.

1.2 Press to active the vertical deflectors

to swing from left to right, the will appear

on the remote display.

1.3 Do it again to stop the swing movement at

the current angle.

2. If the vertical deflectors are positioned manually

which placed under the flaps, they allow to move

the air flow direct to rightward or leftward.

TURBO function

TURBO

To activate turbo function, press the TURBO

button, and will appear on the display.

Press again to cancel this function.

In COOL/ HEAT mode, when you select TURBO

feature, the appliance will turn to quick COOL or

quick HEAT mode, and operate the highest fan

speed to blow strong airflow.

TIMER function ---- TIMER ON SWING function

1. Press TIMER button first time to set

the switch-on, and will appear on the

remote display and flashes.

2. Press or to button to set desired Timer-on

time. Each time you press the button, the time

increases/decreases by half an hour between 0

and 10 hours and by one between 10 and 24

hours.

3. Press TIMER button second time to confirm.

4. After Timer-on setting, set the needed mode

(Cool/ Heat/ Auto/ Fan/ Dry), by press the

MODE button. And set the needed fan speed,

by press FAN button. And press or to set

the needed operation temperature.

CANCEL it by press TIMER button.

3.

Long press or over 3 seconds to select

more angles of the airflow direction.

11

REMOTE CONTROL

MUTE function ECO function

MUTE

1. Press MUTE button to active this function,

and will appears on the remote display.

Do it again to deactivate this function.

2. When the MUTE function runs, the remote

controller will display the auto fan speed, and

the indoor unit will operate at lowest fan

speed to be quiet feeling.

3. When press FAN/ TURBO button, the MUTE

function will be cancel. MUTE function

can not be activated under dry mode.

I FEEL function (Optional)

Press I FEEL button to active the function, the

will appear on the remote display.

Do it again to deactivate this function.

This function enables the remote control to

measure the temperature at its current location,

and send this signal to the air conditioner to

optimize the temperature around you and ensure

the comfort.

It will automatically deactivate 2 hours later.

I FEEL

DISPLAY function (Indoor display)

DISPLAY

Switch ON/OFF the LED display on

panel.

Press DISPLAY button to switch off the LED

display on the panel. Press again to switch on the

LED display.

ECO

In this mode the appliance

automatically sets the operation to

save energy.

Press the ECO button, the appears on the

display, and the appliance will run in ECO mode.

Press again to cancel it.

Note: The ECO function is available in both

COOLING and HEATING modes.

SLEEP function

SLEEP

Pre-setting automatic operating

program.

After 10 hours running in sleep mode, the air

conditioner will change to the previous setting

mode.

Press SLEEP button to activate the SLEEP

function, and appears on the display.

Press again to cancel this function.

GEN function (Optional)

1. Turn on the indoor unit at first, and long press

MUTE button 3 seconds to active, and do it

again to deactivate this function.

2. Under this function, short press MUTE button

to select the General type L3 - L2 - L1 - OF.

3. Select OF and wait 2 seconds to exit it.

12

REMOTE CONTROL

SELF-CLEAN function (Optional)

Gentle Wind function (Optional)

Only optional for some heating pump inverter

appliance.

To active this function, turn off the indoor unit

at first, then press CLEAN button

then you will hear a beep, AC will

appear on the indoor LED, and will

appear on the remote display .

1. This function helps carry away the accumulated

dirt, bacteria, etc from the indoor evaporator.

2. This function will run about 30 minutes, and it

will return to the pre-setting mode. You can

press button to cancel this function during

the process.

You will hear 2 beeps when it's finished or

cancelled.

It's normal if there is some noise during this

function process, as plastic materials expand

with heat and contract with cold.

1.

Turn on the indoor unit, and change to COOL

mode, then press GENTLE COOL button to

activate the function, will appear on the

display.

Do it again to deactivate it.

2. This function will auto close the vertical flaps,

and give you the comfortable gentle wind feeling.

Health function (Optional)

1. Turn on the indoor unit at first, press HEALTH

to active this function, will appear on the

display.

Do it again to deactivate it.

2. When the HEALTH function is initiated, the

Ionizer/ Plasma/ Bipolar Ionizer/ UVC Lights

(depending on models) will be energized and

running.

8 heating function (Optional)

o

C

1. Long press ECO button over 3 seconds to active

this function, and ( ) will appear on

the remote display.

Do it again to deactivate this function.

oo

8C 46F

2. This function will auto start the heating mode

o

when the room temperature is lower than 8 C

o

(46 F), and it will return to standby if the

oo

temperature reaches 9 C (48 F).

o

3. If the room temperature is higher than 18 C

o

(64 F), the appliance will cancel this function

automatically.

Indoor unit

Outdoor unit

oo

Temp < 86 F (30 C)

oo o o

41 F (5 C) < Temp < 86 F (30 C)

We suggest operating this function at the

following ambient conditions to avoid certain

safety protection features.

It's suggested to utilize this function every

3 months.

13

Attempt to use the air conditioner under the temperature beyond the specified range may cause

the air conditioner protection device to start and the air conditioner may fail to operate. Therefore,

try to use the air conditioner in the following temperature conditions.

It beeps briefly once.

It keeps beeping for a while

With the power supply connected, restart the air conditioner after shutdown, or switch it to other

mode during operation, and the air conditioner protection device will start. The compressor will

resume operation after 3 minutes.

Characteristics of heating operation (applicable to Heating pump)

It beeps briefly twice.

Fixed air conditioner:

Preheating:

When the heating function is enabled, the indoor unit will take 2~5 minutes for preheating, after

that the air conditioner will start heating and blows warm air.

Defrosting:

During heating, when the outdoor unit frosted, the air conditioner will enable the automatic

defrosting function to improve the heating effect. During defrosting, the indoor and outdoor fans

stop running. The air conditioner will resume heating automatically after defrosting finish.

Emergency button:

Open the panel and find the emergency button on the electronic control box when the remote

controller fails . (Always press the emergency button with insulation material.)

Current status

Enter mode

Respond

Operation

Standby

Running

Standby

(Only for heating pump)

Press the emergency button

twice in 3 seconds

Cooling mode

Off mode

Heating mode

Press the emergency button

once

Press the emergency button

once

OPERATION INSTRUCTIONS

(open the panel of indoor unit)

control-box cover

Inverter air conditioner:

Dry

Heating

Cooling

027~

Room temperature

-7 24~

T1 climate: 15 43~

17 32~

T3 climate: 15 52~

Outdoor temperature

Temperature

MODE

0 ~30

-20 ~30

Dry

Heating

Cooling

Room temperature

17 32~

Outdoor temperature

Temperature

MODE

T3 climate: 15 55~

(Low temperature

heating: -25 ~30

)

T1 climate: 15 ~53

(Low temperature cooling: -15 ~

53 )

INSTRUCTION FOR SERVICING(R32)

1. Check the information in this manual to find out the dimensions of space needed for proper

installation of the device, including the minimum distances allowed compared to adjacent

structures.

2

2. Appliance shall be installed, operated and stored in a room with a floor area larger than 4m .

3. The installation of pipe-work shall be kept to a minimum.

4. The pipe-work shall be protected from physical damage, and shall not be installed in an

2

unventilated space if the space is smaller than 4m .

5. The compliance with national gas regulations shall be observed.

6. The mechanical connections shall be accessible for maintenance purposes.

7. Follow the instructions given in this manual for handling, installing, cleaning, maintaining and

disposing of the refrigerant.

8. Make sure ventilation openings clear of obstruction.

9. Notice: The servicing shall be performed only as recommended by the manufacturer.

10. Warning: The appliance shall be stored in a well-ventilated area where the room size corresponds

to the room area as specified for operation.

11. Warning: The appliance shall be stored in a room without continuously operating open flames

(for example an operating gas appliance) and ignition sources (for example an operating

electric heater).

12. The appliance shall be stored so as to prevent mechanical damage from occurring.

13. It is appropriate that anyone who is called upon to work on a refrigerant circuit should hold a

valid and up-to-date certificate from an assessment authority accredited by the industry and

recognizing their competence to handle refrigerants, in accordance with the assessment

specification recognized in the industrial sector concerned. Service operations should only be

carried out in accordance with the recommendations of the equipment manufacturer.

Maintenance and repair operations that require the assistance of other qualified persons must

be conducted under the supervision of the person competent for the use of flammable

refrigerants.

14. Every working procedure that affects safety means shall only be carried out by competent persons.

15. Warning:

* Do not use means to accelerate the defrosting process or to clean, other than those

recommended by the manufacturer.

* The appliance shall be stored in a room without continuously operating ignition sources

(for example: open flames, an operating gas appliance or an operating electric heater.

* Do not pierce or burn.

* Be aware that refrigerants may not contain an odor.

Operating instructions

Read technical manual

Caution: Risk of fire

14

16. Information on servicing:

1) Checks to the area

Prior to beginning work on systems containing flammable refrigerants, safety checks are

necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system,

the following precautions shall be complied with prior to conducting work on the system.

2) Work procedure

Work shall be undertaken under a controlled procedure so as to minimize the risk of a

flammable gas or vapor being present while the work is being performed.

3) General work area

All maintenance staff and others working in the local area shall be instructed on the nature of

work being carried out. Work in confined spaces shall be avoided. The area around the

workspace shall be sectioned off. Ensure that the conditions within the area have been made

safe by control of flammable material

4) Checking for presence of refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and during work, to

ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak

detection equipment being used is suitable for use with flammable refrigerants, i.e.

non-sparking, adequately sealed or intrinsically safe.

5) Presence of fire extinguisher

If any hot work is to be conducted on the refrigeration equipment or any associated parts,

appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO

2

fire extinguisher adjacent to the charging area.

6) No ignition sources

No person carrying out work in relation to a refrigeration system which involves exposing any

pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or

explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently

far away from the site of installation, repairing, removing and disposal, during which refrigerant

can possibly be released to the surrounding space. Prior to work taking place, the area around

the equipment is to be surveyed to make sure that there are no flammable hazards or ignition

risks. No Smoking signs shall be displayed.

7) Ventilated area

Ensure that the area is in the open or that it is adequately ventilated before breaking into the

system or conducting any hot work. A degree of ventilation shall continue during the period

that the work is carried out.

The ventilation should safely disperse any released refrigerant and preferably expel it externally

into the atmosphere.

8) Checks to the refrigeration equipment

Where electrical components are being changed, they shall be fit for the purpose and to the

correct specification. At all times the manufacturer's maintenance and service guidelines shall

be followed.

If in doubt consult the manufacturer's technical department for assistance.

INSTRUCTION FOR SERVICING(R32)

15

The following checks shall be applied to installations using flammable refrigerants:

-- The charge size is in accordance with the room size within which the refrigerant containing

parts are installed;

-- The ventilation machinery and outlets are operating adequately and are not obstructed;

-- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the

presence of refrigerant;

-- Marking to the equipment continues to be visible and legible. Markings and signs that are

illegible shall be corrected;

-- Refrigeration pipe or components are installed in a position where they are unlikely to be

exposed to any substance which may corrode refrigerant containing components, unless the

components are constructed of materials which are inherently resistant to being corroded or

are suitably protected against being so corroded.

9) Checks to electrical devices

Repair and maintenance to electrical components shall include initial safety checks and

component inspection procedures. If a fault exists that could compromise safety, then no

electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault

cannot be corrected immediately but it is necessary to continue operation, an adequate

temporary solution shall be used. This shall be reported to the owner of the equipment so all

parties are advised.

Initial safety checks shall include:

-- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of

sparking;

-- That there no live electrical components and wiring are exposed while charging, recovering

or purging the system;

-- That there is continuity of earth bonding.

17. Repairs to sealed components

1) During repairs to sealed components, all electrical supplies shall be disconnected from the

equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely

necessary to have an electrical supply to equipment during servicing, then a permanently

operating form of leak detection shall be located at the most critical point to warn of a

potentially hazardous situation.

2) Particular attention shall be paid to the following to ensure that by working on electrical

components, the casing is not altered in such a way that the level of protection is affected. This

shall include damage to cables, excessive number of connections, terminals not made to original

specification, damage to seals, incorrect fitting of glands, etc. Ensure that apparatus is mounted

securely. Ensure that seals or sealing materials have not degraded such that they no longer serve

the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in

accordance with the manufacturer's specifications.

NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection

equipment. Intrinsically safe components do not have to be isolated prior to working on them.

18. Repair to intrinsically safe components

Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that

this will not exceed the permissible voltage and current permitted for the equipment in use.

Intrinsically safe components are the only types that can be worked on while live in the presence

of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace components

only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant

in the atmosphere from a leak.

INSTRUCTION FOR SERVICING(R32)

16

19. Cabling

Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp

edges or any other adverse environmental effects. The check shall also take into account the

effects of aging or continual vibration from sources such as compressors or fans.

20. Detection of flammable refrigerants

Under no circumstances shall potential sources of ignition be used in the searching for or

detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall

not be used.

21. Leak detection methods

The following leak detection methods are deemed acceptable for systems containing flammable

refrigerants.

Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may

not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a

refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable

for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the

refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of

gas (25 % maximum) is confirmed. Leak detection fluids are suitable for use with most refrigerants

but the use of detergents containing chlorine shall be avoided as the chlorine may react with the

refrigerant and corrode the copper pipe-work. If a leak is suspected, all naked flames shall be

removed/ extinguished. If a leakage of refrigerant is found which requires brazing, all of the

refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part

of the system remote from the leak. Oxygen free nitrogen (OFN) shall then be purged through the

system both before and during the brazing process.

22. Removal and evacuation

When breaking into the refrigerant circuit to make repairs or for any other purpose conventional

procedures shall be used. However, it is important that best practice is followed since

inflammability is a consideration. The following procedure shall be adhered to:

-- Remove refrigerant;

-- Purge the circuit with inert gas;

-- Evacuate;

-- Purge again with inert gas;

-- Open the circuit by cutting or brazing.

The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be

flushed with OFN to render the unit safe. This process may need to be repeated several times.

Compressed air or oxygen shall not be used for this task.

Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill

until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a

vacuum. This process shall be repeated until no refrigerant is within the system. When the final

OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to

take place. This operation is absolutely vital if brazing operations on the pipe-work are to take

place.

Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is

ventilation available.

23. Decommissioning

Before carrying out this procedure, it is essential that the technician is completely familiar with

the equipment and all its detail. It is recommended good practice that all refrigerants are

recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken

in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical

power is available before the task is commenced.

INSTRUCTION FOR SERVICING(R32)

17

a) Become familiar with the equipment and its operation.

b) Isolate system electrically.

c) Before attempting the procedure, ensure that:

. mechanical handling equipment is available, if required, for handling refrigerant cylinders;

. all personal protective equipment is available and being used correctly;

. the recovery process is supervised at all times by a competent person;

. recovery equipment and cylinders conform to the appropriate standards.

d) Pump down refrigerant system, if possible.

e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various

parts of the system.

F) Make sure that cylinder is situated on the scales before recovery takes place.

g) Start the recovery machine and operate in accordance with manufacturer's instructions.

h

)

D

o not overfill cylinders. (No more than 80 % volume liquid charge).

i)

Do not exceed the maximum working pressure of the cylinder, even temporarily.

J)

When the cylinders have been filled correctly and the process completed, make sure that the

cylinders and the equipment are removed from site promptly and all isolation valves on the

equipment are closed off.

K) Recovered refrigerant shall not be charged into another refrigeration system unless it has been

cleaned and checked.

24

. Labeling

Equipment shall be labeled stating that it has been de-commissioned and emptied of refrigerant.

T

he label shall be dated and signed. Ensure that there are labels on the equipment stating the

equipment contains flammable refrigerant.

25

. Recovery

When removing refrigerant from a system, either for servicing or decommissioning, it is

recommended good practice that all refrigerants are removed safely.

When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery

cylinders are employed. Ensure that the correct number of cylinders for holding the total system

charge are available. All cylinders to be used are designated for the recovered refrigerant and

labeled for that refrigerant (i.e. Special cylinders for the recovery of refrigerant). Cylinders shall

be complete with pressure-relief valve and associated shut-off valves in good working order.

E

mpty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.

The recovery equipment shall be in good working order with a set of instructions concerning the

equipment that is at hand and shall be suitable for the recovery of all appropriate refrigerants

including, when applicable, flammable refrigerants. In addition, a set of calibrated weighing scales

shall be available and in good working order. Hoses shall be complete with leak-free disconnect

couplings and in good condition. Before using the recovery machine, check that it is in satisfactory

working order, has been properly maintained and that any associated electrical components are

sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.

The recovered refrigerant shall be returned to the refrigerant supplier in the correct recover

cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units

and especially not in cylinders.

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an

acceptable level to make certain that flammable refrigerant does not remain within the lubricant.

T

he evacuation process shall be carried out prior to returning the compressor to the suppliers.

O

nly electric heating to the compressor body shall be employed to accelerate this process. When

oil is drained from a system, it shall be carried out safely.

INSTRUCTION FOR SERVICING(R32)

18

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